Kannan K, Battula S, Loganathan B G, Hong C S, Lam W H, Villeneuve D L, Sajwan K, Giesy J P, Aldous K M
Wadsworth Center, New York State Department of Health, Albany, New York 12201-0509, USA.
Arch Environ Contam Toxicol. 2003 Jul;45(1):30-6. doi: 10.1007/s00244-002-0267-7.
Residues of organic contaminants--including toxaphene, DDT, trifluralin, hexachlorocyclohexanes, polychlorinated biphenyls, polycyclic aromatic hydrocarbons (PAHs) and nonylphenol--were measured in 32 cotton field soils collected from South Carolina and Georgia in 1999. Toxaphene, trifluralin, DDT and PAHs were the major contaminants found in these soils. The maximum concentration of toxaphene measured was 2,500 ng/g dry weight. Trifluralin was detected in all the soils at concentrations ranging from 1 to 548 ng/g dry weight. Pesticide residues were not proportional to soil organic carbon content, indicating that their concentrations were a reflection of application history and dissipation rates rather than air-soil equilibrium. Soil extracts were also subjected to in vitro bioassays to assess dioxinlike, estrogenic, and androgenic/glucocorticoid potencies. Relatively more polar fractions of the soils elicited estrogenic and androgenic/glucocorticoid activities, but the magnitude of response was much less than those found in coastal marine sediments from industrialized locations.
1999年，对从南卡罗来纳州和佐治亚州采集的32份棉田土壤中的有机污染物残留进行了测定，这些污染物包括毒杀芬、滴滴涕、氟乐灵、六氯环己烷、多氯联苯、多环芳烃（PAHs）和壬基酚。毒杀芬、氟乐灵、滴滴涕和多环芳烃是这些土壤中发现的主要污染物。测得的毒杀芬最高浓度为2500纳克/克干重。在所有土壤中均检测到氟乐灵，其浓度范围为1至548纳克/克干重。农药残留与土壤有机碳含量不成正比，这表明其浓度反映的是施用历史和消散速率，而非气-土平衡。还对土壤提取物进行了体外生物测定，以评估二恶英样、雌激素和雄激素/糖皮质激素活性。土壤中极性相对较大的部分引发了雌激素和雄激素/糖皮质激素活性，但响应程度远低于工业化地区沿海海洋沉积物中的响应程度。
